x = {4, (3,4), [1 2]}; y = {"Hello", 2.0}; z = {x, y}; // z = {{4, (3,4), [1 2]}, {"Hello", 2.0}}
x2 = x(1:2); // x2 = {4, (3,4)} x3 = {4, (3,4), [1 2]}(1:2); // x3 = {4, (3,4)}